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Biomedical subjects

G L Popky

Publications and source records attributed to G L Popky.

At least 37 records · Page 2Linked to original sources
PubMed1984

Digital subtraction angiography in pediatric cerebrovascular occlusive disease.

While conventional angiography has been used to demonstrate cerebrovascular occlusive disease in the past, digital subtraction angiography (DSA) is capable of showing progressive vascular involvement with ease, simplicity, and extremely low morbidity, making it particularly well suited for children and outpatients either alone or coordinated with computed tomography. The authors discuss the usefulness and advantages of DSA as demonstrated in 7 infants and children with hemiplegia, 4 of whom had sickle-cell disease.

Adolescent↗
PubMed1984

Comparison of superior vena cava and antecubital vein as DSA injection site.

A prospective study in 47 patients was undertaken to determine which of the two major sites for injection of contrast material, superior vena cava or antecubital vein, produces digital subtraction images of higher quality. Both injection sites were used to obtain images of the carotid and aortic arch areas in each patient. The two injection sites were also compared for ease of performance of the study, patient acceptance, and incidence of complications and motion artifacts. It was determined that the degree of vessel conspicuity is not affected by injection site when equal volumes of contrast material are injected. No significant differences in overall image quality attributable to injection site were found, except for carotid images obtained in the anteroposterior projection; for these images, the antecubital vein injection site produced significantly better images. Vessel conspicuity was not the major determinant of overall image quality as judged by radiologists.

Angiography↗
PubMed1983

High-resolution computed tomographic appearance of the intrasellar contents in women of childbearing age.

Our experience with high-resolution computed tomography has indicated that the accepted norms for appearance and size of the pituitary gland may not be entirely valid for women of childbearing age. Fifty women with normal menstrual histories and who were not taking oral contraceptives were studied. The study consisted of overlapping 1.5-mm sections through the pituitary fossa in the coronal position only, using a bolus of contrast material followed by a continuous drip during the study. The results indicate that the top of the normal range of gland height is well over the accepted 7 mm and that focal defects within the gland are common. Other variables such as gland shape, width, and overall density were also evaluated.

Adolescent↗
PubMed1982

Radiologic evaluation of the ureteral stump.

The ureter that is left in place after nephrectomy may occasionally give rise to symptoms that are often attributed to other causes. The disease may not be recognized until it is far advanced or is discovered during surgery for another illness. Fourteen diseased ureteral stumps that became symptomatic months to years after nephrectomy are described. Calculi were found in six ureters and neoplasms in five; ureteritis cystica developed in one, infection secondary to vesicoureteral reflux in one, and empyema proximal to an obstructed ectopic ureteral orifice in another. Although there are several methods of imaging the ureteral stump, the best method in the authors' view is retrograde ureterography through a 5-F ureteral catheter. The catheter is inserted during cystoscopy but the injection of contrast medium is done in a radiographic/fluoroscopic facility where carefully monitored fluoroscopic spot radiographs can be obtained.

Adenocarcinoma↗
PubMed1980

Real-time ultrasonography during biliary surgery.

High resolution real-time B-mode ultrasound scanning using a sterile 7.5 MHz transducer was performed during operations on the biliary tract. Ultrasound is useful for locating the common bile duct in the presence of acute inflammation and other abnormal anatomy, detecting small calculi in the gallbladder with a thickened wall, measuring the caliber of the common bile duct, and identifying calculi in the common bile duct. Intraoperative ultrasonography can permit earlier and more precise appraisal of operative findings and, thereby, decrease operative time.

Biliary Tract Diseases↗
PubMed1979

Risk assessment of pulmonary embolism by multivariate analysis.

A prospective study of 6,527 hospitalized patients was performed to evaluate the effectiveness of multivariate analysis of risk factors to correctly designate risk for pulmonary embolism. History of previous pulmonary embolism was the single most important factor. In patients without prior history, five factors emerged: inactivity, congestive heart failure, Doppler ultrasound evidence of deep-vein occlusion, female sex, and black race. Used together, these factors permitted a discrimination of risk such that 68.7% of pulmonary embolization was found to occur in 32.2% of the population designated as showing increased risk. Multivariate analysis of clinical factors improved assessment of risk, compared to the use of lower extremity findings alone, and proved to be useful in identifying individuals at increased risk for pulmonary embolism.

Analysis of Variance↗
PubMed1979

Simple serous cysts of the kidney in children.

Simple renal cysts and reported in 9 children. Two children presented with hematuria following trauma and the cyst was demonstrated on the initial excretory urogram. The other 7 had cysts found on excretory urograms in be course of evaluation of various urologic complaints. The diagnostic approach used was identical to that advocated for adults, namely, percutaneous needle puncture once a solid renal mass has been excluded by an appropriate screening procedure such as ultrasonography. These cysts are benign lesions similar to cysts in adults and are probably more common than the few reported cases would suggest.

Adolescent↗
PubMed1976

Pulsed Doppler ultrasound detection of flow disturbances in arteriosclerosis.

Pulsed Doppler ultrasound blood flow detection has been used in a noninvasive manner to detect arterial abnormalities associated with arteriosclerosis. Sound spectrograms of ultrasound signals obtained from in vitro and animal studies in which flow was disturbed by obstacles placed in the flow stream showed a different distribution of energy over frequency than signals obtained from studies with no flow disturbances. Similar findings were seen clinically. A technique has been developed which can detect disturbed flow patterns resulting from partial occlusion in important superficial arteries (e.g. femoral and carotid) up to 15 cm distal to localized arterial wall abnormalities. Thirty-five arterial examinations of normal and arteriographically abnormal arteries in 12 patients revealed a sensitivity of 83 percent and a specificity of 61 percent. This study suggests that pulsed Doppler ultrasound may be useful as a screening technique for detection of arteriosclerotic lesions in major superficial arteries.

Animals↗
PubMed1975

Hernias of the ureter.--An anatomic-roentgenographic study.

Four cases of herniation of the ureter are presented. A discussion of the various types of ureteral hernia is based on the roentgenographic features of each type as well as the anatomical considerations responsible for these radiographic signs. The use of erect and oblique projections in patients with hernias undergoing urography is urged. The sign of the curlicue ureter is felt to be pathognomonic for ureteral hernia.

Age Factors↗
PubMed1972

Cardiac arrest. I.

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Abdominal Injuries↗